#1F1BB3#1F1BB3

#1F1BB3 is a dark, highly saturated blue. Relative luminance 0.043; OKLCH L 37.5% C 0.221 H 269.7°. Best body text is #FFFFFF at 11.25:1 contrast (WCAG AA passes).

Color values

HEX	#1F1BB3
RGB	rgb(31, 27, 179)
HSL	hsl(242, 74%, 40%)
HSV	hsv(242, 85%, 70%)
CMYK	cmyk(82.7%, 84.9%, 0%, 29.8%)
CIE-LAB	lab(24.73, 53.10, -76.51)
CIE-LCH	lch(24.73, 93.13, 304.76°)
OKLab	oklab(37.45% -0.0013 -0.2214)
OKLCH	oklch(37.45% 0.221 269.7)
XYZ	xyz(9.0909, 4.3288, 42.9955)
Luminance	0.0433 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F1BB3 #AFB31B

analogous

#1B63B3 #1F1BB3 #6B1BB3

triadic

#1F1BB3 #B31F1B #1BB31F

tetradic

#1F1BB3 #B31B63 #AFB31B #1BB36B

square

#1F1BB3 #B31B63 #AFB31B #1BB36B

split-complementary

#1F1BB3 #B36B1B #63B31B

monochromatic

#0D0B49 #16137E #1F1BB3 #312CDF #6561E7

Accessibility & contrast

On white

11.25

#1F1BB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#1F1BB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F1BB3

11.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F1BB3	#FFFFFF	#000000	##FFFFFF
##1F1BB3	1.00	11.25	1.87	11.25
#FFFFFF	11.25	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0042B7

Deuteranopia (green-blind)

#0033B1

Tritanopia (blue-blind)

#004E6A

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1f1bb3;
/* rgb */ color: rgb(31, 27, 179);
/* oklch */ color: oklch(37.5% 0.221 269.7);

Tailwind

colors: {
  custom: {
    50: '#795dcb',
    500: '#1f1bb3',
    950: '#000000',
  },
}

SCSS

$custom: #1f1bb3;
$custom-light: #795dcb;
$custom-dark: #000000;

JSON

{
  "hex": "#1f1bb3",
  "rgb": {
    "r": 31,
    "g": 27,
    "b": 179
  },
  "hsl": {
    "h": 241.579,
    "s": 73.786,
    "l": 40.392
  },
  "oklch": {
    "l": 0.37453,
    "c": 0.22141,
    "h": 269.7
  },
  "luminance": 0.0433
}

Semantic roles & 50–950 ramp

primary

#1F1BB3

secondary

#C9CC5E

accent

#F037EC

background

#F8F5FC

surface

#EFE9F9

border

#CAC5D2

text

#0B0414

muted

#7C7982

Preview Lab

Preview with #1F1BB3

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →